249020549 has 2 divisors, whose sum is σ = 249020550. Its totient is φ = 249020548.

The previous prime is 249020543. The next prime is 249020579. The reversal of 249020549 is 945020942.

249020549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160528900 + 88491649 = 12670^2 + 9407^2 .

It is a cyclic number.

It is not a de Polignac number, because 249020549 - 2⁸ = 249020293 is a prime.

It is a super-2 number, since 2×249020549² = 124022467648522802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249020543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124510274 + 124510275.

It is an arithmetic number, because the mean of its divisors is an integer number (124510275).

Almost surely, 2^249020549 is an apocalyptic number.

It is an amenable number.

249020549 is a deficient number, since it is larger than the sum of its proper divisors (1).

249020549 is an equidigital number, since it uses as much as digits as its factorization.

249020549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 249020549 is about 15780.3849446077. The cubic root of 249020549 is about 629.1367609389.

The spelling of 249020549 in words is "two hundred forty-nine million, twenty thousand, five hundred forty-nine".